[DSE化學2018]同學準備好DSE CHEM未? (3)

772 回覆
11 Like 2 Dislike
2018-04-23 14:25:47
17 why D
2018-04-23 14:26:01
夠啦
上年我好似錯2定3題 最後5**
2018-04-23 14:26:01
SBA 同paper 2 係咪分開計?
2018-04-23 14:26:28
本身relatively non-polar所以唔溶
加NaHCO3變左ionic salt所以soluble
留意佢題目問本身suspension之後變clear
marking有可能要求講埋點解本身唔溶
2018-04-23 14:26:45
有人比卷我先可以砌ans
2018-04-23 14:30:06
LQ先係變數最大 唔知LQ有無大錯既話無得估
2018-04-23 14:32:40
今年係咪易左?
2018-04-23 14:32:49
真係好驚因為Paper 2 冇星
2018-04-23 14:34:13
唔該曬你 但係我目標都係4
2018-04-23 14:37:24
有mc答案?
2018-04-23 14:38:38
今年份卷我都無乜時間剩 paper 1剩<15 mins paper 2剩> mins
不過我做果時成日會覆睇題目睇下有無睇漏野 每條數都會計兩次
2018-04-23 14:39:29
睇返#331
2018-04-23 14:40:47
依家餓到PK 去食野先
我等埋攞到P1B卷再一次過出LQ solution啦
2018-04-23 14:41:35
Lq條Teflon describe this polymerisation essay 4+1 個4分會係咩 好驚攞唔足
1)addition polymerisation
2) def. of addition polymerisation( without elimination of small molecules)
3) 有C=C bonding in monomer
但第4分真係諗唔到 隊哂d monomer repeating unit , eqt落去 同埋寫埋C=C becomes saturated C-C bond
2018-04-23 14:42:54
拎4MC要岩幾多題?
2018-04-23 14:48:41
有C=C bond
under suitable catalyst & condition可做addition polymerisation
monomer join together to form polymer chain (...N-N-N...)
chains attract each other by vdw force -> form a polymer
equation:n F2C=CF2 -> (F2C-CF2)n
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